Equity and Share-Based Compensation - Warrants (Details)	Oct. 21, 2016 $ / shares shares	Feb. 14, 2019 $ / shares shares
Warrants
Warrants
Shares eligible to receive upon exercise of each warrant, Adjustment factor		1.05
Unsecured Note
Warrants
Warrants issued	2,213,789
Warrants to acquire common stock shares (in shares)	2,213,789
Exercise price (in dollars per share) | $ / shares	$ 46.00
Unsecured Note | Warrants
Warrants
Exercise price (in dollars per share) | $ / shares	$ 46.00	$ 43.67
Unsecured Note | Warrants | Maximum
Warrants
Warrants to acquire common stock shares (in shares)		2,332,089
Third lien notes
Warrants
Warrants issued	4,411,765
Warrants to acquire common stock shares (in shares)	4,411,765
Exercise price (in dollars per share) | $ / shares	$ 24.00
Third lien notes | Warrants
Warrants
Exercise price (in dollars per share) | $ / shares	$ 24.00	$ 22.78
Third lien notes | Warrants | Maximum
Warrants
Warrants to acquire common stock shares (in shares)		4,647,520